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Public substance reference

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Search by International Nonproprietary Name (INN), compare names and explore records from international registries.

Substance index

Substances with registered products by first letter; the number is the count of substances per letter.

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ATC classification

Open group A and browse the code hierarchy. Find other groups in the selection below.

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From record to source

Data you can trace to its source

pillbase.ru brings together data from EMA, RxNorm, WHO ATC, PubChem and Wikidata. Every field carries provenance: the source, original record ID and verification date. Values not supplied remain empty.

  • EMA
  • RxNorm
  • WHO ATC
  • PubChem
  • Wikidata
Provenance at a glance
PubChem · ID 3672
Source
PubChem
Record ID
3672
Verified on
2026-05-13

Format illustration. The example date does not indicate a current verification of this record.

Popular substances

Substances with the most registered products.

ATC groups

The 14 top-level anatomical groups of the WHO ATC classification.

For developers

From reference to your product

Request linked products by substance slug. Provenance in the response preserves the connection to the original record.

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Abbreviated response · illustrative values
GET /api/v1/substances/ibuprofen/products
{
  "data": [
    {
      "provenance": {
        "source": "ema",
        "source_record_id": "EXAMPLE-ID",
        "verified_at": "2026-05-13T10:00:00+00:00"
      }
    }
  ]
}
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